Planetary gearing.



K. TROWBRIDGE.

PLANETARY GEARING.

APPLIGATION FILED AUG. s, 1910,

Patented septa E1912.

2 SHBETSJ-SHEET l.

"El n?.

SLW/bypasses i K. TROWBRDGE.

PLANETARY GEARING.

APPLIOATION FILED AUG. 5, 1910.

2. We mi m@ 1T L... ,m mi u QUE MW., .Rs 370 www W 0 Hz. f m .y m P r 6 mif'wwem v 'fer speedchanginggea AVAILAB 'i l .LE Corgi. t.

mmmnrnowmrnen or ATLANTA, GEORGIA.

meeste.

Toallwhmn it may mem.- it known that 1, IKENNETH Tnowmums, afcitizelnef the .United States, re.- eidina't .tlantm in 'the eountgfuf Fulton fand `State of AGeorgie,fhzwe invented new :md .useful Improvements" in Planeery lGeering, of whch the fol-lowing is e specifcatiem l ''lllxey'present invention' provides e variable ,-for.1mechenie'a1ly propelled vehicles,` ofjt e planetary .type and 'of such'fstrueturefasto .admit of gtliree speeds, forwand,`i1igh, intermediatea-nd low, -and lo. flemme, the enstuct-ien'-fbeing such .as toinsureposi-tiveactinendie :simple :1r- .rungementof "theperts,v whereby replacement may ibe `\ensil5f. mede should? occasion necessitate A4and access readily had tol any Imrtrformny desired-:purpose The inwritionieo 'tures, details 4ofccnstruetien:und combinaparticularly setvfforth, illustrated -in the ec.-l

Fig. 5 -is-a cross sect-ion oir-the line 5 5 of.

a5 Fi nl.

.orrespondingnnd like. part-'sare referred --t0 in fthe following-description, and indireated 4n-ull ethe lViews ofthe dra-wings, 'by the :sume reference. characters.

40 The-engine .shaft is-indicated .at.=1 und is .provided with argear ro'ta-table therewith. Ilike driving or propeller shaft is designated by the numeral. 3 and is provided with a gear *treatable therewith. Theend ofthe driving lmft 3 l1as an opening ,to receive. an veznlportinn cftheengine shaft 1 so as -to hold -the -two shafts in line. sleeve 5 is loosely mounted uponthedrivmg shaft. .and hase-geert formed with er otherwise ep- .plied thereto to turn therewith. -A brake member 7 is'keyed or otherwise .fastened to the sleeve `5 -so es to recate therewith. A. brake member 8 is lprovided to coperatie with the bra-ke member -7 to .hold-the latter .stetimnury under .certain cs m'ditions.l Tl-ie .brake member 8 preferably consists ef a "Speciction' et Letters Patent putatienmedsugust 5, 1am. serial No. 575,681.

:19 to retate together.

TLMETARY GEARING.

bm-1d, which .is adepted-tobe contrected so :as'to grip the brake member -7 wllenthe latter isl to be '-held stationary. The Abrake' member 7 consists of a disk-ende rim ntvthe enter edge of 4the disk arranged lto -be gripped by the'breke memberor band 8. A

- ssthreaded and lreceives .a -hub 111, which is threaded thereon endl-secured' in the-adjust- .edfpos'ition by means of a set screw' 12.

Arms 13 radiate 'from -the lhub 11 zand-piv- -otelly .support bell-cranks 14, which arefprovided 'at opposite ends with rollers-trito` operate .with respectively a cone-15 and a Patented-sept. 3,1912.

clutchmember 16, the latter beingkeyedlto the sleeve 9 "to .turn therewith-but ,free .to have a; limited-longitudinal movemenbthereon. A springl 17 normally *exerts a klaressure-upon the/clutch member -l-G to-force the same away from the .several gear elements.-

lVlien the cene 15 is-,movedfnpon'the/engine :shaft in 1n"directiontoward the gearing the bell crzmlm 14: fare operated to press .the clutchl'inember '16 toward the gearing, there- Aby locking theperts andcausiigthe shafts 1 and 8 to rotate together. A brake member v18 ecperates With-the elutchmember 16 so es to lheld the latter against rotation when it is reouired. to reverse the machine.

A drum or casing 19 is loosely 'mounted vupon the sleeves 5 and 9-and has an end portion beveled, esindicated et 20,-to form a clutch member to copera'te-with--thecluteh member 16, thel-atter-having the inner side of its rim beveled-to matchthe 'beveled' end portion-20 oftlie. fdrum'orcasing. WVlien `the clutch member I'16 moved-.toward the gearing bythe-action of the bell eralnks 14 it gripsfthebevelednd 20 of the drum or casing 9 so Vas-to ce'use said drum 'and sleeve Onev end of the drum 19 is removable,a.s indicated at 21, so that -aeoessfmay-be easily had. to the interior of i'thefdrum fon-placing the parts in position or removing them `from the drum' when required. The spring 17 1s interposed between-the drum 19end the elutchmember 16 and is supported upon .adjacent ends of the Ahubs thereof. Gears of ditierent vdiameters are meunted within the drum cr casing 19 andfmesh with the Arespeetinregears?, et, 6 and 210. The .gears ymounted .within the drum are provided .insets which are arrenged so -es fte equalize the strain.v As

`: shown two vsets .of gears 'areprovided and have an opposite arrangement, each set of provided upony a shaft 22.

'eazrs being h 'set comprises gearsV 23, 24., 25 and 26 andthesegseverl gears may be formed to, vgather with the shaft 22 or as separate elements and securedto the shaft in any substantial waygisoas to turn `therewith. -The gear 26 Inesvlieswith the gear 6, the gear 25 with the gear 4, the gear 24 with the gear 2 sumedthat theshaft 1 and `the gear 2 thereofv 20,

individual axis. IThe "several shafts 22 ane suitably mounted within the drumyorcasing19 so asto turn about their gears 23, 24., 25 and 26'are rotatable with'their respective shafts 22.

Wh'e tlie engine is in'operation itlis asis driven so as' to rotatel toftheeright meshing; with'v theI gears 24 rotate the same and thefshaftsf22to thelleft. When the brake `member',1l8.is operated to -grip the clutch member 6,1 the latter;4 is; held sta-' I tionaryf,A `and prevents rotation of the thatth'drumior casing'19 is; caused to rotate i to. 'thileftain Vengine?shaft. zg is' driven to the left` igo'pposite direction to the A8, the drum -or casing -19 Vthegears25 at the same time-,meshewith theigear-A: and drive the shaft` 3,the"rebv reversing the machine. By

reasonofftheditierencein the diameters of l the4 several coperating gears it .will be -understood vthat theshaft 3 vis driven to the left at a `slowerspeed than thel drum or I casing andfat aA considerably -lower 'speed 'than theengne sha Lowsp'eed forwardisattained by 4operating thebrake member'8,"which grips the brake member .7 and holds thesame stational-y together-with-the sleeve 5.and gear 6. `ThedrumV rotating -tofthe leftand car.

rying the ,shafts 22'a`nd ,the gears mounted thereon therewithv will cause theshaft 3 to rotate to the right at a slow speed byreason of the difference in 4diameters 'of the inter'- meshing gears 25 and -4 and'l26 and 6.- The gears 26`are smaller than the gears 25 and the gear tis 'smallerl than the gear 6, hence while the/drum4 19,.is turning tothe left, together'withlth'e shafts 22, the gears 25 by.

reason of tlenlarger-diameter canse. the

- gear 4 to turnto the fight.'

Upon holding -thetlrum or teasing 19 staf tionarv/which. mafy l he effected by means of a brke-band ,27, the lshaft 3 may be driven forward Qatan, intermediate speed. rfhe engine shaft 1 itnmst berremembered is driven to the'rightand causes the gears 24 und thesh'afts 22 totlirnto the left. When the drum lor casing 19-is heldJs'taL tionagv rotation of thesha-ts 22 several gears mounted thereontothe left causes rotation of thegear 4 to the,-;right at. a higher speed than when the brake mem- `sired.`result. y. ,V

From the foregoing description, ytaken '1n connection with t e accompanying drawings'- ber. is held stationary. to the fact thatv the gears 25 This result is due are'of aA less diameter than the gears 24C and the gear 4 is a larger diameter than the gear 2.

Upon moving, the cone 15 so as tol operate .lo

-the bell cranks 14 lto* cause the lclutch 16 l -to grip the clutch member of the drum on p casing 19 the po rts are locked and the shafts .1 and 3 rotate together, thereby resulting in high speed forward.

'The several brake may be mounted inV members 8, 18-'and 2T' any manner and-.ar-

ranged to be opeiate'd by any suitable means such as common It 1s brake bands.

y provided for actuating to be understood that 8g these-brake members are fitted, that isheld against .rotation but .expansible so as to re .lease or to Agrip the coperating brake members as' may be required t'o ett'ectjthe dethe advantagesof`,'the,construct1on and -oV the method of operation will be readily' ap'-r parent lto those 4skilled.A in theffartfto which. 90

the invention appertains, andrwhilell' have described the principle o foperation'of the y invention, together with the device: which -I now consider toA be vthe einbod im'entthereof, I' desire .to have ittmderstood that the de'- Q.

vice shown is 'merelgrjllustrativef and that B such changes l Amay made When desired Y as are within the scope 4vof theclamxapt pended hereto;

Having thusv described theiiivention.

tion of alined'engine 'and d a gear wheel secured -to the e .second gear wheelloose u shaft and having a sleeve w on the engine ich is threadedy riying 1 shafts, ngine shaft, a

at its outer end, a third gear wheel rotatable with the driving shaft, a fourth gear wheel loose upon the driving shaft -andhaving-'a sleeve, a drum mounted loosely upon l the sleeves of the. beforementioned'second and vfourth gear wheels and havin tion beveled to formja clutc `an end vpor-- member, a.

plurality of gear wheels, of differenti diameters, meshing withrthebefore 'mentioned gear ila wheels mounted'upon'Y-the-respective engine and driving shafts and'mounted'within thev 'drum and,- rotatablel es a unit mon axisor'with vthe drum, ber secured to the sleeve of.

fourth gear wheel exterior to' brake member adapted to .en .mentioned brake member to h gear `Wheel'af'.lfainst rotation, .ber adapted about a' com# the aforesaid 12o gage the Imst' 01d thermo-e111 a brake tozengage-the drum to-hold it against rotation, a' clutch'memberrsplined .to the sleeve of the'before mentioned second .gear wheei andada'pted to en member. of formed age'the clutch Vthe beveled I end thereof, a spi-ing inmrpsedpbetmqen the um drum sind clutch member to normally hold I the latter out of action, a brake for engaging v the lust mentioned clutch member to holdit i lund the` aforesaid second gear Wheel from 5' 5 turning. almb threaded upon the outer erid ,of `tl1e sleevelof the before mentioned second gem', Whee1-ad having radial arms, bell cranks-mounted ilpon said arms, each hav* 'ing a. member engaging-the clutch memberA V10 spline@ @o the sleeve ofthe said second gear iwlieel,V4 and 'a cox-ie loose pon the engine' shaftand adapted to engage vthe other meml bers of the bellera-nks.

In testiinoy .whereof 'I affix my signature. v

yin presence of two witnesses.

, KENNETH TRoWB'fBiDGE. 'i 

